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A. E. HASSALL.

METAL CASTING APPARATUS. APPLICATION FILED SEPT. 14. 1915.

Patented Aug. 15, 1916.

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A. E. HASSALL.

METAL CASTING APPARATUS.

APPLICATION FILED SEPT- 14. $915.

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ALBERT EDWARD HASSALL, OF FOOTSCRAY, VICTORIA, AUSTRALIA, ASSIGNOK T0 HIM- SELF AND THE COLONIAL AMMUNITION COMPANY LIMITED, 0F FOOTSCRAY, VIC- TORIA, AUSTRALIA.

METAL-CASTING AYPIARATUS.

Application filed September 14, 1915.

To all whom it may concern:

Be it known that I, ALBERT EDWARD HAs- SALL, a subject of the King of Great Britain, care of The Colonial Ammunition Company Limited, of Gordon street, Footscray, in the State of Victoria, Australia,have invented a Metal-Casting Apparatus, of which the following is a specification.

This invention consists of an improved process of manufacturing metallic cups and improved mechanical contrivances for carrying out the process.

The invention is particularly applicable in the production of first operation cups for cartridge cases, shrapnel shell cases and high explosive shell-cases.

The invention has been devised with the object of eliminating the usual preliminary operations of casting in ingots, series rollings with intermediate annealings and finally punching the metal intothe cup-shape.

The advantages of the invention hereinafter described in detail, are that time is saved in the process of manufacture, the cup is more economically constructed, while moreover, a uniform structure and density of the metal is obtained.

Briefly stated the molten metal is poured into the metallic cup-shaped mold, which is then closed, and while the metal is in a semifiuid condition, it is subjected to compression with a view to consolidating the structure and producing a homogeneous article.

The appended drawings illustrate by way of exemplification one practical form of the mechanical contrivances for carrying out the process and comprise: Figure 1 a ver tical section partly in elevation. Fig. 2 a transverse section online II of Fig. 1, and Fig. 3 a plan showing the mold in position to receive the molten metal.

According to this invention, a pressure plunger 1, adapted to be operated by hydraulic or mechanical means is preferably located under the mold or die block 2, which is split or otherwise and formed with a cup-shaped cavity or die face 3, the internal profile of which is that of the finished article. The upper end 4 of the plunger is shaped correspondingly to the contour of the cup 0 to be manufactured and is adapted to extend into the cup shaped cavity or die face 3. The shank of the plunger is formed. with screw threads 5 with which 66 engagea nut'or collar 6 formed with holes Specification of Letters Patent.

Patented Aug. 15, 1916.

Serial No. 50,669.

7 to receive operating bars and the upper end 8 of said nut is of such a diameter as to enter and close the bottom of the mold. By. this construction practically all the walls of the cup-shaped mold are formed by means of the operative ends of theplunger and nut thereon together with the walls of said cupshaped cavity of the mold, which latter, when ready to receive the molten metal, is somewhat deeper than the cup to be formed therein.

The mold or die block, which bears against a machine head when in operative position, is provided with an inlet or pouring gate adapted to be closed by suitable means such for instance as a metallic cutter bar or capping block 9 movable endwise in a passage 11 formed in the mold.

According to the construction shown the pouring gate 10, which is preferably tapered, may be formed in the bar 9 which isadapted to slide longitudinally in the passage 11 formed in the mold or die block 2. This bar 9 completes the outer and top wall of the mold. As will be seen from the drawing, the bottom or under wall of the mold is formed by the upper ends 4: and 8-of the plunger 1 and nut 6, respectively, which latter enter the cavity in the mold and completely close the under side of the mold block.

In operation the molten metal is delivered through'the gate into the cup-shaped mold which is then closed by the endwise movement of the bar 9, and, while semi-fluid, the metal is compressed by the forward, upward movement of the plunger 1 and by turning the nut 6, so that the metal is consolidated and forms a homogeneous metallic cup of uniform structure ready for the ensuing operations if necessary to complete it for the object for which it is intended.

According t0 the construction of the contrivances as illustrated, the die block 2 is freely pivoted on a column 12 and supported in position upon a clamp collar 13 fast to said column, and the base 14 of the plunger is similarly pivoted on said column and supported when necessary upon a U-shaped removable supporting collar 15.

The die block and plunger are swung around into the position shown in Fig. 3 and the metal is poured into the block through the opening or gateway 10 in the cutter bar 9, which is then moved longitudinally in the 7 in position, the ram lowered and the mold or die block and plunger swung around and the metallic cup removed from the mold.

I claim 1. An apparatus of the class described comprising, a mold block into which molten metal is poured, a plunger adapted to enter said mold for compressing said metal, a collar encircling said plunger and adjustable thereon, said collar being adapted to enter said mold together with said plunger to form one wall of the mold.

2. An apparatus of the class described comprising, a mold block into which molten metal is poured, a plunger for compressing said metal, a collar adjustably threaded on said plunger, the upper end of said plunger and collar being adapted to enter said mold and form one wall thereof.

3. An apparatus of the class described comprising, a mold block, a capping block formed with an inlet through which the molten metal is poured into said mold block and slidably mounted in the latter so that the inflow of metal into the mold block may be cut off, said capping block being adapted to form one Wall of'said mold, a plunger for compressing the metal in the mold, and a collar adjustable on said plunger, said plunger and collar being adapted to enter said mold and form another wall thereof.

5. An apparatus of the class described comprising, a frame including a machine head, a mold block pivotally mounted on said frame and movable relative to said machine head, said mold block being adapted to engage with said head, a plunger mounted on said frame and slidable to move into said mold block for compressing the metal therein, said plunger having a pivotal move ment corresponding to the movement of said mold block, and a ram for actuating said plunger to compress the metal.

6. A device of the character described, comprising a frame including a machine head, a mold block pivotally mounted on the frame and adapted to bear against said head, means slidably mounted in said mold block for controlling the admission of molten metal into the latter and adapted to form one Wall of the mold, a plunger slidably mounted on said frame and adapted to enter said mold, said plunger having a pivotal movement corresponding to the movement of said mold block, a collar adjustably mounted on said plunger, said plunger and collar being adapted to enter said mold block to compress the metal therein and form one wall of said mold, and a ram for actuating said plunger.

Dated this eleventh day of August, 1915.

ALBERT ED'WARD HASSALL. 

